2,3-Dinor iPF2α-III-d9 is the labelled version of 2,3-Dinor iPF2α-III (P838650). 2,3-Dinor iPF2α-IIIis a metabolite of 8-isoprostaglandinF2α (a potential indicator of lipid peroxidation and oxidative stress). 2,3-Dinor iPF2α-IIIcan be utilized to examine the effect of antibiotic treatment on the intestinal metabolome.It also serves as one of the multiple biomarkers for oxidative damage in ischemic stroke.